Decepticons
- Megatron (va Seizō Katō): Leader of the Decepticons and Optimus Prime's arch enemy. Transforms into a modified Walther P38.
- Seekers: Three Decepticons who assume the form of McDonnell Douglas F-15 Eagle jets.
- Starscream (va Hirotaka Suzuoki): Air Commander of the Decepticons who seeks to overthrow Megatron.
- Skywarp: Resident prankster who hangs with Thundercracker.
- Thundercracker: Hangs with Skywarp.
- Soundwave (va Issei Masamune): One of Megatron's loyal soldiers. Transforms into a microcassette recorder.
- Laserbeak: One of Soundwave's Cassetticons. Robot form is a mechanical condor.
- Ravage: One of Soundwave's Cassetticons. Robot form is a mechanical jaguar.
- Ratbat (va Ken Shiroyama): One of Soundwave's Cassetticons. Robot form is a mechanical bat.
- Decepticon Combiners
- Constructicons: The first set of Decepticon combiners, the Constructicons merge to become Devastator.
- Scrapper: Commander of the Constructicons. Transforms into a front-end loader. Unlike most of the combiners, Scrapper becomes Devastator's right leg.
- Scavenger: Transforms into a power shovel. Becomes Devastator's right arm.
- Mixmaster: Transforms into a cement mixer. Becomes Devastator's left leg.
- Long Haul: Transforms into an off-road dump truck. Becomes Devastator's torso.
- Bonecrusher: Transforms into a bulldozer. Becomes Devastator's left arm.
- Hook: Scrapper's second-in-command. Transforms into a crane. Becomes Devastator's shoulders and head.
- Stunticons: The second set of Decepticon combiners, the Stunticons merge to become Menasor. Their rivals are the Aerialbots.
- Motormaster: Commander of the Stunticons, Motormaster likes to think of himself as Optimus Prime's rival for the title "King of the road". Transforms into a Kenworth K100 Aerodyne semi trailer truck. Becomes Menasor's torso.
- Dead End: Transforms into a Porsche 928. Forms Menasor's left arm/left leg.
- Breakdown: Transforms into a Lambourghini Countach. Becomes Menasor's right leg/left arm.
- Drag Strip: Transforms into a Tyrell P-34 6-wheeler race car. Forms Menasor's right arm/right leg.
- Wildrider: Transforms into a Ferrari 308 GTB sports car. Becomes Menasor's left leg/right arm.
- Combaticons: The third set of Decepticon combiners, the Combaticons merge to become Bruticus. Their rivals are the Protectobots. They were originally under Starscream's command in an attempt to overthrow Megatron.
- Onslaught: Commander of the Combaticons. Transforms into a mobile anti-aircraft truck. Becomes Bruticus' torso.
- Brawl: Transforms into a Leopard 1 main battle tank. Becomes Bruticus' left leg.
- Swindle: Transforms into a FMC XR311 combat support vehicle. Becomes Bruticus' right leg.
- Blast Off: Transforms into a Space Shuttle Becomes Bruticus' right arm.
- Vortex: Transforms into a Kaman SH-2 Seasprite helicopter. Becomes Bruticus's left arm.
- Constructicons: The first set of Decepticon combiners, the Constructicons merge to become Devastator.
- Trypticon: Metroplex's own arch-enemy. Transforms into a city, and a battle station, and finally a Tyrannosaurus, as his robot mode.
Read more about this topic: Transformers: Scramble City, Characters